pygi-convert.sh: Cover Message and Buttons types
pygi-convert.sh: Cover Message and Buttons types

https://bugzilla.gnome.org/show_bug.cgi?id=635244

thiblahute/pygobject,davibe/pygobject,pexip/pygobject,Distrotech/pygobject,Distrotech/pygobject,davibe/pygobject,davidmalcolm/pygobject,nzjrs/pygobject,GNOME/pygobject,jdahlin/pygobject,sfeltman/pygobject,davibe/pygobject,davidmalcolm/pygobject,sfeltman/pygobject,sfeltman/pygobject,MathieuDuponchelle/pygobject,GNOME/pygobject,thiblahute/pygobject,alexef/pygobject,choeger/pygobject-cmake,thiblahute/pygobject,MathieuDuponchelle/pygobject,Distrotech/pygobject,jdahlin/pygobject,davidmalcolm/pygobject,pexip/pygobject,pexip/pygobject,nzjrs/pygobject,choeger/pygobject-cmake,GNOME/pygobject,nzjrs/pygobject,alexef/pygobject,choeger/pygobject-cmake,alexef/pygobject,Distrotech/pygobject,davibe/pygobject,jdahlin/pygobject,MathieuDuponchelle/pygobject